The Younger Dryas was an abrupt cooling period around 13,000 years ago that was believed to be caused by:

Question

Quizplus · Accepted Answer

The Younger Dryas is believed to have been caused by a change in the thermohaline circulation of the Atlantic. This change was likely triggered by a large influx of freshwater from melting glaciers and ice sheets, which disrupted the normal circulation patterns of the ocean and resulted in the abrupt cooling of the climate.

The Younger Dryas Was an Abrupt Cooling Period Around 13,000